Three rounds of interviews - first with a recruiter, second with the hiring manager, and the third was a technical interview preceded by a technical exercise. After completing the process, they took about a month to get back with a decision while constantly promising they would have something "by end of week". Easily one of the worst communication experiences I have had with an interview. The technical exercise centers around a hypothetical integration issue stemming from poor data quality and asks you to diagnose the issue and come up with mitigation strategies. It's honestly not too bad, but the prompt is poorly worded and doesn't clearly define what a successful integration looks like, so you have to make some assumptions and guesses about how a "correct" integration would function. The technical interview largely retreads the same things in the technical exercise, which seems redundant. In one case, an interviewer asked me a question that I had already answered in the exercise which leads me to believe they had not reviewed it beforehand.